4-methyl-1-pentene polymer, resin composition containing 4-methyl-1-pentene polymer, masterbatch thereof, and formed product thereof

Abstract

[Object] To provide a resin composition with excellent mold releasability and blocking resistance. [Solution] A resin composition containing a 4-methyl-1-pentene polymer includes 0.01 to 10 parts by mass of a 4-methyl-1-pentene polymer (B) per 100 parts by mass of at least one resin (A) selected from the group consisting of thermoplastic resins and thermosetting resins, wherein the 4-methyl-1-pentene polymer (B) has (B1) an intrinsic viscosity [η] of 0.01 or more but less than 0.50 dl/g measured at 135° C. in a decalin solvent.

The invention claimed is: 
     
       1. A formed product containing a 4-methyl-1-pentene polymer, comprising 0.01 to 10 parts by mass of a 4-methyl-1-pentene polymer (B-1) per 100 parts by mass of a propylene resin composition (X),
 wherein: 
 the 4-methyl-1-pentene polymer (B-1) has 
 (B1) an intrinsic viscosity [η] of 0.01 or more but less than 0.50 dl/g measured at 135° C. in a decalin solvent, and 
 (B4) a melting point (Tm) in the range of 120° C. to 245° C. as measured with a differential scanning calorimeter, and 
 the propylene resin composition (X) contains 60 to 100 parts by weight of a propylene polymer (A-1) and 0 to 40 parts by weight of a propylene polymer (A-2) (the total of the (A-1) component and the (A-2) component is 100 parts by weight), 
 the propylene polymer (A-1) has 
 (A-1-1) a Shore A hardness in the range of 20 to 94, 
 (A-1-2) a constitutional unit derived from propylene in the range of 51% to 100% by mole, and 
 (A-1-3) a melting point less than 100° C. or no melting point as measured by DSC, and 
 the propylene polymer (A-2) has 
 (A-2-1) a melting point of 100° C. or more but less than 175° C. as measured by DSC. 
 
     
     
       2. The formed product according to  claim 1 , wherein the resin composition containing a 4-methyl-1-pentene polymer experienced a shear and/or uniaxial, biaxial, or planar elongational flow in a molten state. 
     
     
       3. A film comprising a formed product according to  claim 2 . 
     
     
       4. A multilayer film, comprising a film according to  claim 3 , and an adhesive layer. 
     
     
       5. A formed product containing a 4-methyl-1-pentene polymer, comprising 0.01 to 100 parts by mass of a 4-methyl-1-pentene polymer (B-2) per 100 parts by mass of a propylene resin composition (X),
 wherein the 4-methyl-1-pentene polymer (B-2) has 
 (B11) an intrinsic viscosity [η] of 0.01 or more but less than 3.0 dl/g measured at 135° C. in a decalin solvent, and 
 (B6) satisfies the relationship expressed by the following formula (I):
     A≦ 0.2≦[η] (−1.5)   (I)
 
 
 wherein A denotes the percentage (% by mass) of a component having a polystyrene equivalent molecular weight of 1,000 or less in the 4-methyl-1-pentene polymer as measured by gel permeation chromatography (GPC), and [η] denotes the intrinsic viscosity (dl/g) of the 4-methyl-1-pentene polymer measured in a decalin solvent at 135° C. and 
 (B4) a melting point (Tm) in the range of 120° C. to 245° C. as measured with a differential scanning calorimeter, and 
 the propylene resin composition (X) contains 60 to 100 parts by weight of a propylene polymer (A-1) and 0 to 40 parts by weight of a propylene polymer (A-2) (the total of the (A-1) component and the (A-2) component is 100 parts by weight), 
 the propylene polymer (A-1) has 
 (A-1-1) a Shore A hardness in the range of 20 to 94, 
 (A-1-2) a constitutional unit derived from propylene in the range of 51% to 100% by mole, and 
 (A-1-3) a melting point less than 100° C. or no melting point as measured by DSC, and 
 the propylene polymer (A-2) has 
 (A-2-1) a melting point of 100° C. or more but less than 175° C. as measured by DSC. 
 
     
     
       6. The formed product according to  claim 5 , wherein the resin composition containing a 4-methyl-1-pentene polymer experienced a shear and/or uniaxial, biaxial, or planar elongational flow in a molten state. 
     
     
       7. A film comprising a formed product according to  claim 6 . 
     
     
       8. A multilayer film, comprising a film according to  claim 7 , and an adhesive layer.